Hi I'm try modiefied this class, for receive just 1 node ex:
xml from this class:

<?xml version="1.0"?>
<root>
<subject id="1">
<title>welcome to use</title>
<author>admin</author>
<content>welcome to use this php&amp;xml guestbook, version 1.0. This guestbook does not load domxml. so even if the host does not support domxml, this guestbook will still run well^^. Wish you use it enjoyably^^. If uou have any questions or advices, please go to http://phpjoe.512j.com or http://blog.csdn.net/mynamesucks/archive/2004/12/28/231747.aspx to submit words or send mail to mynamesucks@163.com</content>
<time>2004-12-25 22:50:10</time>
<picture>2</picture>
</subject>
</root>